THE MYRIAPODA OF NORTH AMERICA. 



211 



S. SPINIOERUS. 



S. fulvus, maoulis saturate viridis maxiinis ornatus; capito minute punctato, infra punctorum magnorum serie 

 instruoto; oculis suborbiculatis ; antenuis longis; segmentis 48 ; seutis leviter sparse punetatis; squama preanali 

 triangula. 



Fulvous, ornamented with very largo deep-green maculae; head minutely punctate, furnished inferiorly with a 

 series of large punota; eyes suborbioular; antennae long; segments IS; scuta sparsely lightly punctate ; preanal 



scale triangular. 



S. 8PINIGEBUS, Wood, Proc. Acad. Nat. Sei., 186 I, p. 15. 



Fig. 38. 



Pig. 39. 



The color of this species is fulvous, often varying towards orange. On each scutum 

 there is a large dark-green transverse crescentic blotch. This is often so wide superiorly 

 as to involve the whole of the dorsum. In some individuals there arc lateral series of 

 white blotches, and occasionally a black line on each side. These are, however, not com- 

 mon. The head has a strongly pronounced median furrow, and is greenish superiorly. 

 The eye-spots are somewhat orbicular, with occasionally a tendency to become tetragonal 

 or polygonal. The antenna? are longer than in S. marginatas. The scuta arc not rough, 

 and are very lightly or even obsolctely furrowed beneath. The spines on the inferior sur- 

 face of (,1k; legs are very nurftcrous and acute. The 

 male (Fig. 38) appendages are formed of two main 

 portions joined together, as in S. marginatus. The 

 large plate of the main process is broad. The upper 

 border of its face has a wavy outline. Externally 

 it is produced into an alar portion, which ends in a 

 blunt process at right angles to it. The inner piece 

 is composed of a basilar and superior joint. The 

 basilar is very long. The other (Fig. 39) is curved, 



and presents on one aspect a strongly convex, on the other a strongly concave surface. It 

 ends in a blunt point, and is armed with a large blunt process and an acute spine. The 

 female appendages appear to consist on each side of a process deeply placed within the 

 body, — this is thin on its free margin, which is rounded, though somewhat acuminate ; 

 below it is contracted and thickened. The three pairs of feet immediately in front of the 

 genital aperture in the male have their coxa: produced into long processes. These are 

 often of a curious form, but do not seem constant in this. The fourth and even fifth coxso 

 have small processes. 



Hab. Florida. South Carolina. — Smithsonian Institution. 



